I’m not sure. My experience is some bunnies from the start are less stressed by the car, and others are just stressed, no matter what you do. My sense is it has more to do with the rabbit’s personality than getting them used to the car.
Having them think of their carrier as a safe space does help in general, so if possible you can leave it out and open, as sort of hideout, all the time, so bun feels at home in it. For a while I would always feed my buns their pellets in their carrier so they would like hanging out in it.
For me it would be a balance of the length of time you’d be gone, the length of the car ride, and how stressed he gets. My impression is Louie is a pretty adaptable little dude, so he might tolerate it well, but I still would prob only take him a long for trips longer than a couple days, and for car rides that weren’t too long. Sorry if that’s vague! lol
.
.
.
The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.